Book  (Jan 1999)  Page(s) 87.  
 
Pottsii Herbaceous Peony... collected in 1821 in China for the Horticultural Society

Book  (Jan 1917)  Page(s) 51.  
 
Guerin also produced some red peonies - chiefly with magenta tints - which owed their dark colour to P. Pottsii.
 

Book  (Jan 1917)  Page(s) 59.  
 
In 1858, H.A. Terry of Crescent, Iowa, one of the pioneers among peony experts of this country, obtained from William Robert Prince, who had inherited the Linnaean Botanic Garden, at Flushing, thirty varities of P. albiflora, inclusing Humei, Pottsii, Reevesii, Comte de Paris, fragrans, festiva maxima, lutetiana, edulis superba, plenissima rosea and Queen Victoria.

Book  (Jan 1917)  Page(s) 46.  
 
In 1837, the variety Pottsii was described as the most splendid of the five albifloras cultivated in English gardens. It had been introduced from China by John Potts—an intrepid plant-collector—in 1822, and named after him.....
In 1850, Salter, a nurseryman, began a collection with the albifloras, Edulis superba (splendid, with edible roots), originated by Lemon in France in 1824, Pottsii and Reevesii, and some other varieties imported from Belgium.

Book  (1917)  Page(s) 224.  
 
Albiflora ( white flowered) . Central China and Siberia. Older Varieties:....Pottsii, introduced in 1821, from China, by John Potts, a collector who had been sent there by the Royal Horticultural Society. There are six peonies named Pottsii or a variety of the same. The famous Pottsii in John Richardson's garden was a rich deep crimson and double.
 

Website/Catalog  (1908)  Page(s) 37.  
 
Pottsi. Semi-closed peony form. Amaranth-red.

Website/Catalog  (1908)  Page(s) 25.  
 
Pottsi. Dark crimson with yellow stamens; early....Each  .20, per 10  1.50, per 100  12.00

Book  (1907)  Page(s) 45.  
 
Pottsii. Unknown. An early, popular, old sort, somewhat variable; some years semi-double and again full double. Splendid, deep purple blooms.
 

Website/Catalog  (1903)  Page(s) 1.  
 
DOUBLE HERBACEOUS PAEONIES ....SERIES A Plants 50 cents each.
Pottsi, purple crimson, very showy.

Website/Catalog  (1888)  Page(s) 28.  
 
HERBACEOUS HARDY JUNE-FLOWERING CHINESE DOUBLE PAEONIAS. VARIETIES OF ALBIFLORA.
Pottsii, rich crimson, with golden anthers , 1s. 6 d.